Regarding the rotation direction

Hi all, I´m working with a car and I´m stuck with a simple issue. How can I know wich is the rotation direction of the wheels? My problem is as follows: If you look the car from the side it lies on the ZY plane, the nose is pointing to the Y negative (so the air is set to flow in the positive Y direction). I put the two origins of the rotation axes in the middle of each wheel and the rotation axis direction is X=1 Y=0 Z=0. Whit this configuration, are the wheels rotating ok or are they rotating in reverse?? I hope I was clear.. sorry for my english.